detecting that ubifs switched to ro after problem

[Artem Bityutskiy]

On Sun, 2010-06-13 at 12:47 +0300, Artem Bityutskiy wrote:
> On Fri, 2010-06-11 at 22:46 -0400, Jon Ringle wrote:
> > Hi,
> > 
> > I'd like to be able to somehow detect that ubifs has taken the action
> > of switching from rw to ro due to some error detected in the ubifs
> > filesystem. If I can detect this then maybe I can do something about
> > it, such as copying the ubifs contents to a .tar.bz2 in /tmp,
> > mkfs.ubifs, and restore .tar.bz2 back again.
> > 
> > Is there a way I can do this?
> 
> I think with 2fde99cb55fb9d9b88180512a5e8a5d939d27fec you can check for
> R/O state from /proc/mounts. Also, you can use something like inotify to
> watch /proc/mounts changes and react if UBIFS became r/o.

Just added:

http://www.linux-mtd.infradead.org/faq/ubifs.html#L_detect_ro

for your convenience.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)